energy does things for us. make a list of all the ‘things’ you think energy does
DESCRIPTION
Energy is defined as The ability to produce change or do work We recognize the tasks energy does as: Light Heat Motion Sound Growth TechnologyTRANSCRIPT
Warm-up: What is Energy? Energy does things for us. Make a list of all the ‘things’ you
think energy does
Warm-up: #2 on sheet #7 Now that you understand a little
more about the efficiency of energy transformation, how much do you think you’d need to eat if our bodies were 100% efficient at converting food (chemical energy) to motion/sustaining life?
What is Energy?
Energy is defined as The ability to produce change or do work
We recognize the tasks energy does as: Light Heat Motion Sound Growth Technology
2 Forms of Energy
Potential – Stored energy and the energy of position (gravitational).
Kinetic – Motion energy. The motion of waves, electrons, atoms, molecules and substances.
2 Forms of Energy Look at the summary card of Energy Forms
at your table – one is highlighted Use the white-board at your table to make a
mini-poster of that form of energy Your poster must have:
Large title stating the form of energy Whether it is Potential or Kinetic Energy Picture representing where the energy is stored Picture representing an example of that type of
energy You are done with this task at: ___________
Gallery Walk of Energy
You have ___ minutes to visit each others posters
Be sure to write down: Type of energy Whether it is Potential or Kinetic Draw picture or write down where the
energy is stored and an example You are back in your seats at:
____________
Energy Transformations
Energy is conserved We don’t use it up, it just changes form When energy changes form, the total
quantity of energy remains the same *** Except when mater is converted to
energy during nuclear fusion and fission
Examples of Energy Transformation:
Examples of Energy Transformation:
Examples of Energy Transformation:
Examples of Energy Transformation:
Energy Efficiency
Energy isn’t gained or lost when it changes form
BUT it doesn’t ALL change from one form to the next
Efficiency: how much useful energy you get out of a system Energy transformation isn’t very efficient
Energy Efficiency
Energy transformation isn’t very efficient
Energy Efficiency
Energy Efficiency
Energy transformation isn’t very efficient
Light
Energy Efficiency on a large scale: Power Plants
Flashlight demo
It’s all about turning turbines
It’s all about turning turbines
Renewable and Non-renewable EnergyNON-RENEWABLE
Cannot be replenished in a short period of time
RENEWABLE
Supplies are replenished in a short amount of time
Question: Is Electricity a Renewable or Non-Renewable Resource?
36.50%
24.70%
20.90%
8.80%1.00%
4.10%2.80% 0.70% 0.40% 0.10%
Where We Get Our Energy – The US as a whole
Where We Get Our Energy- Seattle in particular
87.90%
6.40%
2.50% 2.10%
1.10%Other Sources
Energy Consumption
What is energy ‘doing’ for you right now?
On your white boards: Draw a picture or make a list of all the
ways your have used energy in the past hour
Be ready to share your board in 5 minutes
Energy Consumption
We all use different amounts of energy
The average American uses about as much energy as is stored in 7 gallons of gasoline.
That’s every person, every day. Over a course of one year, the sum
of this energy = to about 2,500 gallons of gasoline per person.